Multiple door lock



Nov. 1, 1949. r F. BONE BERGE 2,486,460

MULTIPLE DOOR LOCK Filed May 22, 1846 Y 5 Sheets-Sheet 1 FIGURE fin a4a2 INVENTOR.

FREDERICK A.BONENBERGER I A Midm ATTIC! RN EYE Nov. 1, 1949.

F. A. BONENBERG ER MULTIPLE DOOR LOCK Filed May 22, 1946 Ill Um FIGURE 25 Sheets-Sheet 2 FIGURE 3 INVENTOR. FREDERICK A BONENBERGER ATTD RN EYBNov. 1, 1949. F. A. BONENBERGER 2,486,450

MULTIPLE DOOR LOCK Filed May 22, 1946 3 Sheets-Sheet 3 FIGURE Z FIGURE 5[NV "OR.

FREDERICK A. BONENBERGER A'ITD RN EYS Patented Nov. 1, 1949 UNITEDSTATES-PATENT OFFICE MULTIPLE DOOR LOCK Frederick A. Bonenbrger, Norristown, Pa. Application May 22, 1946, Serial No. 671,537

' 2 Claims.

My present invention relates to an improved multiple door lock and moreespecially to the locking mechanism provided for an enclosing structuresuch as a refrigerator having a plurality of doors wherein according tomy invention the doors may be selectively locked from a central handlehaving indicated positions or all of the doors may be locked, and thesingle handle,

may itself be locked. However only one accessible outside lock isprovided for the operating handle and by simple manipulation of thishandle the said doors may be selectively locked and unlocked.

In the accompanying drawings I have illustrated one complete example ofthe physical embodiment of my invention according to the best mode Ihave thus far devised but it will be understood that various changes andalterations may be made in the exemplified structure within the scope ofthe appended claims.

In the drawings:

Figure 1 is an assembly view of the locking mechanism of my invention infront elevation.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a front elevational view of the operating disk and theconnected links.

Figure 4 is a modified form of the controls.

Figure 5 is a sectional view taken on the line 5-5 of Figure 3.

Figure 6 is a sectional view taken on the line 66 of Figure 8.

Figure 7 is an enlarged fragmentary view, partly in section, disclosingcertain details of the invention.

Figure 8 is a front elevational view of an enclosing structure showingthe plurality of doors and the operating handle therefor.

Referring now to the drawings in detail I have illustrated an enclosingstructure which may be a refrigerator or cabinet or other structurehaving doors I, 2, 3, and 4 closing the openings in the front wall 5thereof. The center post 6 is provided between the pairs of doors andthe doors are hinged as at 1, while individual latches 8 and keepers 9are fashioned as illustrated for each door. These latches are solely forthe purpose of keeping the doors closed and have no true lockingfunction and form no part of the invention.

In the locking mechanism of my invention I employ a disk I2 secured uponthe shaft l4 for rotation therewith and an external handle it isprovided on the portion thereof protruding from operating the front ofthe refrigerator or cabinet. The shaft [4 is rotatably mounted in thecenter post 6 and an inner wall of the refrigerator as shown in Figure2. t

A locking disk I8 is also provided on the shaft I 4 in fixedrelationthereto and the notches 20 therein co-act with the lock 22 having anotchengaging bolt 24 formed with an escutcheon plate 26 on the coverplate 28; Thus with the bolt 24 projected into a notch the handle I6 maynot be manipulated and the entire mechanism is locked.

The cover plate 28 is suitably retained on the center post 6 by screws,as shown in Figures 1 and 8 and is formed with anarcuate series ofdepressions 36 into which progressively the balls 32 fall and arepressed by the spring 34 in the handle l6, Figure '7. The depressionsare marked 'to indicate the doors I, 2, 3, and 4 for which thedepressions respectively act to releasably detain the handle [6.

The links 36 pivotally connected with the links 31 are connected inpivotal relation with the disk l2 and are located diametrically oppositeeach other thereon. The upper link 31 is secured to the cam block 38 forreciprocal movement when the disk I2 is rotated, and the cam faces 40and 42 on the opposite edges of the cam block at different positionswill engage the rollers 44 on the bolts 46 to depress the bolts againstthe tension of the springs 48 in the cylinders 50 whereupon the saidbolts will when depressed engage the keepers of the doors I and 2respectively. The cam face 40 is located to engage its roller firstwhile a further upward movement of the block will cause the second camface 42 to engage its roller.

Below the disk l2 the links 36 and 31 associated in the same fashionwith the disk 12 provide reciprocal movement for the cam block 52 havingspaced cam faces 54 and 56 on the opposite sides thereof.

These lower cam faces 54 and 56 are spaced on the cam block 52 to co-actprogressively with the rollers 58 on the bolts 50 and these bolts aredepressed against the tension of the springs 82 through the cylinders 64into the keepers of the doors 3 and 4 respectively.

It should be-noted that the four cam faces 40 and 42, and 54 and 56 areeach located a different distance from the center of the disk I2 andthis radial difference is determined in order that selected movement ofthe disk on its axis by the handle will move into operating positiononly one cam face at a time. The cam faces will op- 3 mate in thefollowing order, 40, 42, 54, and 56 to respectively lock the doors I, 2,3, and 4. When the handle is moved to position all of the cam faces willbe in position so that the bolts will be withdrawn from the doors andall doors will be unlocked.

In Figure 4 I have shown a modified form of the operating mechanismwherein a disk on the shaft 12 and having a handle 14 is fashioned witha gear 16 on the shaft and the opposite rack bars 18 and 19 are moved ino posite direction by rotation of the handle and shaft. The bar 19 isformed with notches therein as 80 for selective engagement with the lock82 by means or the bolt 84. Access to the lock is provided exterior ofthe refrigerator by means of .the escutcheon plate 86.

From the above description it.will be apparent that the mechanism of myinvention is positive in operation and will permit the selective controlof the four illustrated doors to lock doors I, I, 3, or 4 in order tounlock all or the doors.

Having thus fully described my invention what I claim as new and desireto secure by Letters whereby continued rotation of the disk andreciprocation of the links will progressively engage the cam faces withthe bolts to lock the same.

2. A locking mechanism for multiple doors including a normally open boltfor each door, an operating disk, a shaft and handle therefor, a coverplate on the shaft provided with position indicating indicia for thehandle, opposed links diametrically mounted on the disk, said linksbeing extensible under rotary movement of the disk, cam blocks on thelinks for reciprocation therewith, and cam faces on said blocks radiallyspaced from the center of the disk whereby movement of the handle to aselected indicated position will extend the links and the cam blocks toactuate the cam face corresponding to the selected position.

FREDERICK A. BONENBERGER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 608,893 McArthur .l--........sa.n ARE. 9, 1898 2,260,326 Marine -a 00k 28, 1941 FOREIGN PATENTS NumberCountry Date 631,479 Germany .m....-....=. Jan. 28, 1938

